STAAR Biology Category 2 Review

Front

Match the DNA sequence GAA to the correct amino acid using a codon chart.

Back

LEU

Front

Match the DNA sequence TGA to the correct amino acid using a codon chart.

Back

Thr

Front

Why did the shaved area on a Himalayan rabbit grow black fur when an ice pack was placed over it?

Back

The genes for black hair were activated by specific temperatures.

Front

According to the Punnett square in basic mendelian genetics: B represents the dominant gene for blue feathers and b represents the recessive gene for red feathers. Two heterozygous birds have one offspring. What percent chance does it have for red feathers?

Back

25%

Front

What is the final result in meiosis?

Back

Four new cells, each with half the chromosomes.

Front

Which cross would result in 100% pink flowers in snapdragons where red is incompletely dominant to white? Options: RR x rr, rr x rr, Rr x Rr, RR x RR

Back

RR x rr

Front

AB blood type is an example of what type of inheritance? Options: complete dominance, incomplete dominance, codominance, polygenic inheritance

Back

codominance

Front

Colorblindness is more common in males than in females because...

Back

the allele for colorblindness is recessive and located on the X chromosome

Front

Why do cells with the same genetic material develop into different types of cells?

Back

Because internal and external stimuli can trigger the activation of specific genes in the DNA of cells

Front

Human bone, muscle, and nerve cells all contain the same number of chromosomes with the same complement of genes. What enables these cells to perform specialized activities?

Back

The regulation of gene expression within each cell type